package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.CACHE_SHOP_TTL;
import static com.hmdp.utils.RedisConstants.LOGIN_USER_KEY;

/**
 * CLassName: RefreshTokenInterceptor
 * Description:
 * Author: wuzhixiang
 * Date: 2024-10-31 9:24
 * Version: 1.0
 */
public class RefreshTokenInterceptor implements HandlerInterceptor {
    private StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1 获取请求头中的token
        //UserDTO user = (UserDTO) request.getSession().getAttribute("userDTO");
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank(token)) {
            return true;
        }

        //3 基于token获取redis用户
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(RedisConstants.LOGIN_USER_KEY + token);
        if(userMap.isEmpty()){
            return true;
        }
        //5 将查询到的Hash数据转为UserDTO对象
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);

        //6 存在把用户信息存到ThreadLocal中
        UserHolder.saveUser(userDTO);

        //7 刷新token有效期
        stringRedisTemplate.expire(LOGIN_USER_KEY+token,CACHE_SHOP_TTL, TimeUnit.MINUTES);
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }
}
